Damper device

Abstract

A damper device includes a case that is filled with oil, a weight that is stored in the case and includes a central through hole, a central guide rod that is inserted into the central through hole of the weight and configured to allow the weight to slide in the oil, and at least one flow passage that is formed in the weight and through which the oil flows.

What is claimed is: 
     
         1 . A damper device comprising:
 a case that is filled with oil;   a weight that is stored in the case and includes a through hole;   a guide rod that is inserted into the through hole of the weight and configured to allow the weight to slide in the oil; and   at least one flow passage that is formed in the weight and through which the oil flows.   
     
     
         2 . The damper device according to  claim 1 , further comprising a unit configured to close the at least one flow passage formed in the weight. 
     
     
         3 . The damper device according to  claim 2 , wherein the unit configured to close the flow passage includes a screw hole formed in the flow passage. 
     
     
         4 . The damper device according to  claim 1 , further comprising:
 one support part configured to slidably support one end part of the weight; and   another support part configured to slidably support another end part of the weight.   
     
     
         5 . The damper device according to  claim 1 , further comprising a right stopper and a left stopper at a central part of the weight, wherein:
 the right stopper includes a right plate member whose longitudinal direction coincides with a left-right direction, a right long hole formed in the right plate member and having a long diameter in the left-right direction, and a right adjusting screw that is screwed into the weight through the right long hole; and   the left stopper includes a left plate member whose longitudinal direction coincides with the left-right direction, a left long hole formed in the left plate member and having a long diameter in the left-right direction, and a left adjusting screw that is screwed into the weight through the left long hole.